package com.lagou.edu.utils;

/**
 * @author sunli
 */
public class StringUtils {

    public static String lowerFirst(String oldStr) {
        char[] chars = oldStr.toCharArray();
        chars[0] += 32;
        return String.valueOf(chars);
    }

    public static Boolean isEmpty(String str) {
        if (str == null || "".equals(str)) {
            return true;
        }
        return false;
    }
}
